Psoriasis

To be fair, psoriasis is an autoimmune-related skin condition that can show up even if you never touch a cigarette.

However, if you do smoke, your risk for the scaly skin condition goes up—a lot.

According to a 2007 study, if you puff a pack a day for 10 years or less, psoriasis risk goes up 20%; 11–20 years and your risk is 60% higher; and for those who pass the two-decade mark, the psoriasis risk more than doubles. (Even secondhand smoke during pregnancy or childhood is linked to a higher risk.)

Thinner hair

As if the wrinkly skin wasn’t enough, smoking hurts your hair too. Experts think the toxic chemicals in smoke can damage the DNA in hair follicles and generate cell-damaging free radicals as well.

The end result? Smokers have thinner hair that tends to go gray sooner than nonsmokers. That is, if they have any hair at all.

Men who smoke are about twice as likely to lose their hair as nonsmokers, after taking into account factors that increase the risk of baldness, such as aging and genetics, according to a 2007 study in Taiwan.

Natural glow is gone

Ever notice how smokers’ skin sometimes seems off? You’re not alone. A 1985 study came up with the term Smoker’s Face to describe certain facial characteristics, such as wrinkles, gauntness, and a gray appearance of the skin, caused by smoking.

Wound healing

Several studies have found that smokers do not heal as well after surgeries such as face-lifts, tooth extractions, and periodontal procedures.

So once cigarettes wrinkle up your face, you’ll have a harder time correcting the damage with cosmetic surgery than people who’ve never smoked. (And your surgeon might not even perform the procedure until you agree to kick the habit.)

Warts

For reasons that aren’t entirely clear, smokers are more susceptible to infection with human papillomavirus, a large family of viruses that can cause warts—including genital warts.

While genital warts are caused by sexually transmitted types of HPV, smoking is also a risk factor. Even taking the number of sex partners into account, women who smoke are nearly four times as likely to have genital warts as nonsmokers, according to one study.

Stretch marks

The nicotine found in cigarettes damages the fibers and connective tissue in your skin, causing it to lose elasticity and strength.

Stretch marks, red skin striations that can gradually fade to a silvery hue, form when you gain weight rapidly. Anyone can get stretch marks with rapid weight gain (such as in pregnancy), but cigarettes can be a contributing factor.

Flabby tummy

Cigarettes can be an appetite suppressant, and often smokers have a lower body weight than nonsmokers. However, a 2009 study in the Netherlands found that smokers had more visceral fat than nonsmokers.

This deep fat pads internal organs and can accumulate in your midsection, ultimately increasing the risk of other diseases, such as diabetes.

Cataracts

More than half of Americans will have developed some degree of cataracts by age 80. Cigarette smoking can increase the risk of cataracts by putting oxidative stress on the lens of the eye.

In fact, continued smoking can add up to a 22% increased risk of cataract extraction, according to one study. And it’s not too late to quit—the amount of cigarettes smoked was a more important risk factor than how long someone smoked.